How to find textures in a model?
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It's probably safe to assume that any image textures are UV mapped onto the model, as Blender does this by default. But, there are a ways to check.

If you don't see any images in the UV or Image editors, it's because no image is selected. Let's use the UV image editor, as you want to see the UVs. At the top of the editor there will be two buttons labeled New and Open. To the immediate left  of these there is a little image icon with an arrow. Clicking this opens a menu that lists all the images in the file.

To see the UVs and how the texture applies to the model, you will have to select the specific model/section you want to look at. With your mouse in the 3D view, press Tab to enter edit mode, and then A to make sure everything is selected.

Now go back to the UV editor and you should see the UVs. You will may have to open the appropriate image from the menu mentioned above if you want to see exactly how the UVs are laid onto that image.

Do note that this doesn't change which texture the model uses. If you want to see which textures the model uses, you will have to look at the material. To do this, switch to the Shading workspace, and at the bottom center you will see the shader editor. In this shader will be a network of nodes. Image texture nodes will have an orange header with the name of the texture as the title.

One other thing to note, the image files are probably packed into the .blend file. If they are, you may want to unpack them by going to File>External Data>Unpack All Into Files and choosing the first option.